Point or strainer for drive-wells



Nirnp STATES FFICEQ are? I POINT OR STRAINER FOR DRIVE-WELLS.

GEECIFICATION forming part of Letters Patent No. 304,617, dated September 2, 1884.

l Application filed May 1, 1884. (No model.)

llo @ZZ whomY it may concern.-

Be it known that I, AUGUsr D. CooK, a citizen of the United States, residing at Lawrenceburg, in the county of Dearborn and State of Indiana, have invented certain new and useful Improvements in Points or Strainers for Drive-Wells, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to certain improvements in well points and strainers, and is designed to simplify the construction of drivenwell points, forming the walls of the strainer sufciently strong, without multiplying the parts, to stand the driving strain.

In more fully describing the device,refer ence will be made to the accompanying drawings, in which-.-

Figure l represents an elevation of the strainer, the point and the connecting-collar being in section; and Fig. 2, an enlarged section through the strainer, showing the peculiarshape of the rods forming the saine.

A represents the point of the tube, being adapted by its conical shape to pierce the ground into which it may be driven, and is provided with the internal recess, B, which saves material and weight, without materially affecting the strength of the said point. In the upper or larger end of the point is an annular recess or groove, C, into which is received the lower end of the strainer. The strainer is cylindrical in form, and is composed of rods trapezoidal in cross-section, and designated in the drawings by the letter D. Near each end of each alternate rod is struck up on each side of the said rod a lug or projection, E, which serves the purpose of keeping the rods slightly separated when in position. The separation of the 4rods allows the water to percolate through the walls of the strainer and thoroughly prevent the passage ofany solid matter-#such as sand, small gravel, or dirt-in fact, thoroughly straining the water. The shape ofthe rods-trapezoidal-is an important factor in the strainer, by allowing variation in the number used, and therefore the diameter of the said strainer, without altering the size of the said rods. At equ'idistant points onthe outside of thestrainer are the rings F, for preventing the rods spreading under pressure. Each of the rings are double, being secured together and also to the rods of the strainer by a ring of solder, G, between the two parts of the ring, the outer edges of which are beveled. The purpose .of the soldering, as described, is to prevent any of the said solder running into and clogging the spaces between the rods on each side the said rings. The top of the strainer is adapted to enter and to be secured in an annular groove,l H, in the lower side of the collar I. The collar has its upper internal surface screwthreaded to receive the end of the well-tube. All the parts are preferably secured by solder, and the material used in construction prefcrably brass. The operation is simple and easily understood from the above description of the device.

Itis well known that many well-point strainers have been invented and used; but all are more or less complex in construction. ,Some have a perforated tube to give strength, and an outer covering of wire to strain the water. Others have longitudinally extended round wires, with an inner sieve, but adapted to be placed only after the hole has been made, thus requiring an eXtra driving-point, and so on.

In the device above described in the speciiication the point is strong and light, and the strainer is exceedingly simple in construction, yet has sufficient strength to stand being driven into the hardest earth; and, again, there being no complication of parts, the strainer and the strengthening-tube being one and the same, and being formed of brass, it is practically indestructible by the action of the water or other causes.

Having described the device, what I claim is- 1. The trapezoidal rods forming the strainer, secured to suitable retaining devices, substantially as described.

2. rIhe trapezoidal rods forming the strainer, the alternate ones' having on each side, top and bottoni, lugs struck up on them, the

'said rods being properIy seated and secured,

substantially as described.

3. The conical point or head having an internal recess and an annular groove, in com- ICO c y N/ bnaton with the trapezoidal rods seated there- Well point and strainer, substantially its de- Io in, the parts beng adapted to operate subscribed. stantiztlly as and for the purpose specicd. In testimony whereof I affix my signature in 4. The conical, recessed, and grooved head, presence of two witnesses. the screw-threaded and grooved collar, and the trapezodal rods, the alternate ones hzw- AUGUST D COOK ing on each side lugs, top and bottom, the Witnesses: said rods being bound together and prevented CHARLES L. SKINNER, l from spreading by rings7 the Whole forming a l JOHN ENCHEss. 

